frowsty (adj.)youdaoicibaDictYouDict[frowsty 词源字典]
"having an unpleasant smell," 1865, of unknown origin; perhaps related to Old French frouste "ruinous, decayed," or to Old English þroh "rancid;" both of which also are of uncertain origin. Also compare frowzy.[frowsty etymology, frowsty origin, 英语词源]